s3/idmap: Fix out of memory error with Winbind idmap.

This fixes bug #5945.
(cherry picked from commit a7735416792f8156e53a04af98e7e2dff0b6707d)

diff --git a/source/winbindd/idmap.c b/source/winbindd/idmap.c
index d601210ecfb59711f36f4221696b62cd760ffb1d..e4fc75ab7221e8e279fdbd89fa1ba19ee1b50926 100644 (file)
--- a/source/winbindd/idmap.c
+++ b/source/winbindd/idmap.c
@@ -555,8 +555,12 @@ NTSTATUS idmap_init(void)
                 * set the destructor for this domain */
                talloc_set_destructor(dom, close_domain_destructor);
 
-               dom->params = talloc_strdup(dom, compat_params);
-               IDMAP_CHECK_ALLOC(dom->params);
+               if (compat_params) {
+                       dom->params = talloc_strdup(dom, compat_params);
+                       IDMAP_CHECK_ALLOC(dom->params);
+               } else {
+                       dom->params = NULL;
+               }
 
                /* Finally instance a backend copy for this domain */
                ret = dom->methods->init(dom);